What kind of fuzz box do you have?I have a great one. It's very old. It's called a Project WEM. I've never seen another one. But it's a lovely fuzz box. It's been used by many famous guitar players, because they say it's got a unique sound. People have actually tried to make copies of it. They took down all the components and tried to build another one, but they never really got quite the same thing. I've used it on all my records, actually, from the first record I made. Whenever you hear my particular fuzz guitar sound, that's the fuzz box. Sometimes what sounds like guitar is really synthesizer or vice versa....

Reason why I said FZ-1a is because of the 10K on Q2's Collector, but I see your point... it's kind of a cross between the two with some different coupling cap values. Probably just arrived on something that worked with the common transistors available.

Incidentally, I just built an FZ-1 for a friend, and I was really surprised at how good it sounded. I need to build one for myself now!

soulsonic wrote:Nice blog.....Incidentally, I just built an FZ-1 for a friend, and I was really surprised at how good it sounded. I need to build one for myself now!

Thanks - I should update it more, but it's too much like work.

I built an FZ-1 a while back, but with yet another wrong schematic (this time by Jack Orman, with one collector resistor value hugely wrong) and it was very weak with -3V - it sounded good with -9V (and lower gain trannies) though So yeah, I've got a proper FZ-1 on the way too as soon as I get my pedals back and I can swap that one out. Got some 2N270s too. I think now we've got a corrected schem this circuit could have a new lease of life.